What are the cheapest airlines flying from Belfast to San Francisco round-trip?

Flying on British Airways is currently your cheapest option to San Francisco, with prices starting at £403. Another option worth looking into is American Airlines, starting at £467 return. British Airways is currently priced 26% below the average price you’ll pay for this route.

What is the cheapest month to book a flight from Belfast to San Francisco?

Currently, February is the cheapest month in which you can book a flight from Belfast to San Francisco (average of £538). Flying from Belfast to San Francisco in July is currently the most expensive (average of £803). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Belfast to San Francisco?

Travellers seeking maximum savings on their Belfast to San Francisco flight should consider departing on Thursday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

What is the cheapest day to fly round-trip from Belfast to San Francisco?

Users have found that flying from Belfast to San Francisco on a Monday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from Belfast to San Francisco?

Flights from Belfast to San Francisco lean towards being more expensive in December. Prices are generally better when you fly from Belfast to San Francisco in September, with the cheapest ticket starting at £385.

What airport do you fly into for flights to San Francisco from Belfast?

Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from Belfast. Booking flights from Belfast to San Francisco (SFO) should be relatively easy as there are 0 daily inbound flights from Belfast from 2 different airlines.

Can I find deals for flights from Belfast to San Francisco that include hotel bookings?

Yes. In addition to deals on Belfast to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Belfast to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to San Francisco.

Can I find deals for business class flights from Belfast to San Francisco?

Yes. Cheapflights offers flight deals from Belfast to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£333+ Flights from Belfast to San Francisco

Cheap flight deals from Belfast to San Francisco

Round-trip from	£539
One-way from	£333
Popular in	December
Cheapest in	September
Average price	£518

British Airways
9/9-16/9
3 total stops
35h 25m total
Belfast to San Francisco

Search Deals

1/11
3 total stops
53h 45m total
Belfast to San Francisco

Search Deals

Highest demand for flights based on searches. 8% potential increase in price (£35 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Belfast to San Francisco

Cheapest flights from Belfast to San Francisco
Explore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Tue 9/920:55BFS - SFO

1 stop30h 35mMultiple Airlines

Tue 16/921:20SFO - BFS

1 stop17h 50mMultiple Airlines

Deal found 12/8£490

Tue 9/906:35BHD - SFO

1 stop15h 15mMultiple Airlines

Tue 16/911:10SFO - BHD

2 stops20h 10mMultiple Airlines

Deal found 12/8£539

Fri 24/1006:30BHD - SFO

1 stop13h 15mKLM

Mon 3/1113:55SFO - BHD

1 stop23h 05mKLM

Deal found 14/8£614

Fri 24/1006:35BHD - SFO

1 stop15h 15mBritish Airways

Sun 2/1123:59SFO - BHD

2 stops30h 16mBritish Airways

Deal found 14/8£625

Fri 24/1006:35BHD - SFO

2 stops19h 24mBritish Airways

Mon 3/1112:11SFO - BHD

2 stops18h 04mBritish Airways

Deal found 14/8£636

Fri 24/1006:05BFS - SFO

2 stops22h 33mMultiple Airlines

Sun 2/1117:30SFO - BFS

1 stop16h 45mMultiple Airlines

Deal found 14/8£637

Fri 24/1006:05BFS - SFO

2 stops22h 33mMultiple Airlines

Mon 3/1120:40SFO - BFS

1 stop16h 50mMultiple Airlines

Deal found 14/8£638

Fri 24/1006:35BHD - SFO

1 stop15h 15mBritish Airways

Fri 31/1021:40SFO - BHD

1 stop14h 35mBritish Airways

Deal found 13/8£658

Mon 22/906:10BFS - SFO

2 stops19h 57mMultiple Airlines

Mon 22/921:20SFO - BFS

1 stop15h 15mMultiple Airlines

Deal found 12/8£659

Fri 24/1020:05BHD - SFO

1 stop25h 45mMultiple Airlines

Fri 31/1011:14SFO - BHD

2 stops23h 01mMultiple Airlines

Deal found 13/8£661

Fri 24/1017:25BHD - SFO

1 stop26h 20mMultiple Airlines

Sat 1/1114:55SFO - BHD

1 stop18h 55mMultiple Airlines

Deal found 13/8£664

Fri 24/1006:15BFS - SFO

1 stop21h 05mMultiple Airlines

Fri 31/1013:50SFO - BFS

1 stop17h 15mMultiple Airlines

Deal found 13/8£664

Best flights from Belfast to San Francisco
Discover carefully curated flight deals from Belfast to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 August 2025.

Tue 9/920:55BFS - SFO

1 stop30h 35mMultiple Airlines

Tue 16/921:20SFO - BFS

1 stop17h 50mMultiple Airlines

Deal found 12/8£490

Fri 24/1006:30BHD - SFO

1 stop13h 15mKLM

Mon 3/1113:55SFO - BHD

1 stop23h 05mKLM

Deal found 14/8£614

Fri 24/1006:35BHD - SFO

1 stop15h 15mBritish Airways

Sun 2/1123:59SFO - BHD

2 stops30h 16mBritish Airways

Deal found 14/8£625

Tue 9/906:35BHD - SFO

1 stop15h 15mMultiple Airlines

Tue 16/911:10SFO - BHD

2 stops20h 10mMultiple Airlines

Deal found 12/8£539

Fri 24/1006:35BHD - SFO

2 stops19h 24mBritish Airways

Mon 3/1112:11SFO - BHD

2 stops18h 04mBritish Airways

Deal found 14/8£636

Fri 24/1006:05BFS - SFO

2 stops22h 33mMultiple Airlines

Sun 2/1117:30SFO - BFS

1 stop16h 45mMultiple Airlines

Deal found 14/8£637

Fri 24/1006:35BHD - SFO

1 stop15h 15mBritish Airways

Fri 31/1021:40SFO - BHD

1 stop14h 35mBritish Airways

Deal found 13/8£658

Fri 24/1006:05BFS - SFO

2 stops22h 33mMultiple Airlines

Mon 3/1120:40SFO - BFS

1 stop16h 50mMultiple Airlines

Deal found 14/8£638

Mon 22/906:10BFS - SFO

2 stops19h 57mMultiple Airlines

Mon 22/921:20SFO - BFS

1 stop15h 15mMultiple Airlines

Deal found 12/8£659

Fri 24/1020:05BHD - SFO

1 stop25h 45mMultiple Airlines

Fri 31/1011:14SFO - BHD

2 stops23h 01mMultiple Airlines

Deal found 13/8£661

Fri 24/1017:25BHD - SFO

1 stop26h 20mMultiple Airlines

Sat 1/1114:55SFO - BHD

1 stop18h 55mMultiple Airlines

Deal found 13/8£664

Fri 24/1006:15BFS - SFO

1 stop21h 05mMultiple Airlines

Fri 31/1013:50SFO - BFS

1 stop17h 15mMultiple Airlines

Deal found 13/8£664

Last-minute flights from Belfast to San Francisco
Discover last-minute flight deals from Belfast to San Francisco. Data last updated 15 August 2025 and is based on user searches.

Wed 20/806:50BHD - SFO

1 stop15h 00mBritish Airways

Fri 5/915:59SFO - BHD

2 stops18h 16mBritish Airways

Deal found 13/8£707

Wed 20/806:50BHD - SFO

2 stops20h 03mIberia

Fri 5/913:21SFO - BHD

2 stops18h 09mIberia

Deal found 12/8£742

Wed 20/806:30BHD - SFO

1 stop13h 15mDelta

Fri 5/913:45SFO - BHD

1 stop23h 30mDelta

Deal found 12/8£865

Wed 20/806:50BHD - SFO

2 stops20h 03mAmerican Airlines

Fri 5/915:59SFO - BHD

2 stops18h 16mAmerican Airlines

Deal found 14/8£900

Tue 9/920:55BFS - SFO

1 stop30h 35mMultiple Airlines

Tue 16/921:20SFO - BFS

1 stop17h 50mMultiple Airlines

Deal found 12/8£490

Tue 9/906:35BHD - SFO

1 stop15h 15mMultiple Airlines

Tue 16/911:10SFO - BHD

2 stops20h 10mMultiple Airlines

Deal found 12/8£539

Mon 22/906:10BFS - SFO

2 stops19h 57mMultiple Airlines

Mon 22/921:20SFO - BFS

1 stop15h 15mMultiple Airlines

Deal found 12/8£659

Mon 22/908:50BHD - SFO

1 stop16h 35mMultiple Airlines

Mon 22/921:20SFO - BHD

1 stop14h 15mMultiple Airlines

Deal found 12/8£954

One-way flights from Belfast to San Francisco
Search for one-way flight options from Belfast to San Francisco. Find affordable one-way fares based on user searches. Data last updated 15 August 2025.

Sat 1/1122:25BFS - SFO

3 stops53h 45mMultiple Airlines

Deal found 13/8£333

Sat 1/1119:20BHD - SFO

3 stops56h 50mMultiple Airlines

Deal found 13/8£336

Tue 7/1013:40BFS - SFO

2 stops32h 55mMultiple Airlines

Deal found 13/8£341

Mon 6/1016:10BFS - SFO

3 stops29h 25mMultiple Airlines

Deal found 13/8£341

Wed 8/1014:20BHD - SFO

3 stops32h 10mMultiple Airlines

Deal found 13/8£350

Wed 8/1016:20BFS - SFO

3 stops30h 10mMultiple Airlines

Deal found 13/8£355

Mon 6/1008:50BHD - SFO

2 stops36h 45mMultiple Airlines

Deal found 13/8£375

Thu 9/1006:10BFS - SFO

2 stops25h 34mMultiple Airlines

Deal found 13/8£388

Sat 11/1007:00BHD - SFO

2 stops24h 44mMultiple Airlines

Deal found 13/8£392

Tue 7/1020:20BHD - SFO

2 stops26h 15mMultiple Airlines

Deal found 13/8£404

Fri 10/1006:05BFS - SFO

2 stops22h 33mMultiple Airlines

Deal found 13/8£408

Fri 10/1007:00BHD - SFO

2 stops21h 38mMultiple Airlines

Deal found 13/8£423

Cheapflights Fare Finder

Use the filters below to find and compare flights from Belfast to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 9/9

20:55-19:30

1 stop30h 35m

San Francisco

Tue 16/9

21:20-23:10

1 stop17h 50m

£490

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Tue 9/9

06:35-13:50

1 stop15h 15m

San Francisco

Tue 16/9

11:10-15:20

2 stops20h 10m

£539

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/10

06:30-11:45

1 stop13h 15m

San Francisco

Mon 3/11

13:55-21:00

1 stop23h 05m

£614

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/10

06:35-13:50

1 stop15h 15m

San Francisco

Sun 2/11

23:59-14:15

2 stops30h 16m

£625

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/10

06:35-17:59

2 stops19h 24m

San Francisco

Mon 3/11

12:11-14:15

2 stops18h 04m

£636

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Fri 24/10

06:05-20:38

2 stops22h 33m

San Francisco

Sun 2/11

17:30-18:15

1 stop16h 45m

£637

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Fri 24/10

06:05-20:38

2 stops22h 33m

San Francisco

Mon 3/11

20:40-21:30

1 stop16h 50m

£638

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/10

06:35-13:50

1 stop15h 15m

San Francisco

Fri 31/10

21:40-19:15

1 stop14h 35m

£658

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Mon 22/9

06:10-18:07

2 stops19h 57m

San Francisco

Mon 22/9

21:20-20:35

1 stop15h 15m

£659

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 24/10

20:05-13:50

1 stop25h 45m

San Francisco

Fri 31/10

11:14-17:15

2 stops23h 01m

£661

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 28 results

Best time to book a flight from Belfast to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast to San Francisco

What is the cheapest time of day to fly from BFS to SFO?

One of the essential ways to save on airfare from Belfast to San Francisco is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 10% on airfare.

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from Belfast to San Francisco, such as American Airlines and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.

American Airlines

7.2

Good

10,000 reviews

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.

British Airways

6.7

Okay

7,267 reviews

American Airlines

7.2

Good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.

Related info for your journey

What airport do you fly into for flights to San Francisco from Belfast?
Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from Belfast. Booking flights from Belfast to San Francisco (SFO) should be relatively easy as there are 0 daily inbound flights from Belfast from 2 different airlines.
What are the cheapest airlines flying from Belfast to San Francisco round-trip?
Flying on British Airways is currently your cheapest option to San Francisco, with prices starting at £403. Another option worth looking into is American Airlines, starting at £467 return. British Airways is currently priced 26% below the average price you’ll pay for this route.
Can I find deals for flights from Belfast to San Francisco that include hotel bookings?
Yes. In addition to deals on Belfast to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Belfast to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to San Francisco.
Can I find deals for business class flights from Belfast to San Francisco?
Yes. Cheapflights offers flight deals from Belfast to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Belfast to San Francisco?
Currently, February is the cheapest month in which you can book a flight from Belfast to San Francisco (average of £538). Flying from Belfast to San Francisco in July is currently the most expensive (average of £803). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Belfast to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£403	Average£571	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£467	Average£518	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Belfast to San Francisco?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco from Belfast today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Belfast to San Francisco?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Belfast to San Francisco.

Can Cheapflights find flights from Belfast to San Francisco with no change fees?

Certainly. Search results for flights to San Francisco from Belfast shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Belfast to San Francisco become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Belfast today and book when prices fit your budget.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Belfast to San Francisco from £333

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Belfast to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Belfast to San Francisco

Cheapest flights from Belfast to San FranciscoExplore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Explore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Belfast to San Francisco that are best for you.

Best time to book a flight from Belfast to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Belfast to San Francisco

What is the cheapest time of day to fly from BFS to SFO?

Find hourly flight availability from Belfast to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 August 2025.

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from Belfast to San Francisco, such as American Airlines and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Belfast to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to San Francisco from Belfast?

What are the cheapest airlines flying from Belfast to San Francisco round-trip?

Can I find deals for flights from Belfast to San Francisco that include hotel bookings?

How can I find direct flights from Belfast to San Francisco?

Can I find deals for business class flights from Belfast to San Francisco?

What is the cheapest month to book a flight from Belfast to San Francisco?

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Belfast to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Belfast to San Francisco

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Belfast to San Francisco?

Why should you use Cheapflights to find cheap flight tickets from Belfast to San Francisco?

Can Cheapflights find flights from Belfast to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from Belfast to San Francisco become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Belfast to San Francisco
Explore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.